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8 December, 00:38

A car weighing 13,000 N starts from rest and accelerates to 95.0 km/h in 5.00 s. The friction force is 1,450 N. Find the applied force (in N) produced by the engine. (Enter the magnitude.)

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  1. 8 December, 03:57
    0
    = 8.46 * 10³N

    Explanation:

    W = 1.3 * 10⁴

    v₁ = 0

    v (friction) = 95km/h = 26.4 m/s

    t = 5s

    f = 1450N

    mass of body = W / g

    =1.3 * 10⁴ / 9.8

    =1327 kg

    v (friction) = v + at

    substitute in eqn 1

    26.4 = 5a

    a = 5.28 m/s

    Force Net = F₁ + F₂ + F₃ = ma

    F (engine) = ma + F

    = 1327 (5.28) + 1450

    = 8.46 * 10³N
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